US980867A - Calculating device. - Google Patents

Description

R. H. PENN.

CALCULATING DEVICE.

APPLICATION FILED APR. 26, 1910.

980,867, Patented Jan. 3, 1911.

INVENTOR MBER! H. FERN, OI SUFIEBN, NEW'YOBX.

cancomrms mwrcn.

I Specification of Letters hunt;

Application iiled April 28, 1910. Serial No. 557,682.

To all whom it may concern:

Be it known that I, Ronnn'r H. Farm, a citizen of the United States, and a resident of Sufi'ern. in the county of Rockland and State of New York, have invented certain new and useful Improvements in Calculating Devices, of which the following is a specification.

My invention aims to provide certain improvements in calculating devices, es ecially those of a circular form in which a'p urality of annular scales are provided on disks or similar members which are in parallel and contiguous planes, and particularly to that form u n which Letters Patent No. 922,465, dated ay 25, 1909, were granted to me.

The accompan ing drawings illustrate.

embodiments of t e nvention.

Flgure 1 shows a lan view with clamp in neutral position. ig. 2 shows a cross section thereof. Fig. 3 shows a cross section of same with clamp moved toward the left and engaging the upper disk. Fig.4 shows.

a cross section of same with clamp moved toward the 'ri ht and engaging the, lower disk, Fig. 5 s ows a plan view of clamp.

Fig. 6 shows a cross section thereof. Fig. 7 shows an end view of same. I

The scales marked upon the device may be the same or similar to those shown in my Letters Patent 922,465, both as to those on the lower opaque disk A, and as to those on the u per transparent disk B. The two disks the commoncenter of said scales. In Fig. l the logarithmic scales L and O and the square root scales are on the lower disk, and

the logarithmicscales M and N are on the under surface of the upper disk.

It is extremely desirable and of great usefulness that either a value or a result obtained on the scales of the upper disk, be-

capable of being transferred to the scales on the lower disk without having to carry this D is mounted on the central pin P between the two disks A and B, but that it is fixed from motion relatively to the pin only in a direction transversely to itself. The slot S shown in the central portion of the clamp is out exactly so that its sides engage the pin P upper disk where it underlies t tion of the clamp occupies a position in the and B are also rotatably mounted at wardly and then back on itself until it is.

parallel with the surface of the clamp, so that a space F is left between the clamp and the folded over end. This space at the por-' tion of the clamp near the bend is made so that it is slightly less than the thickness of the u or disk, and after a short distance Patented Jan. 3,1911.

throu h the common center of the the 0 ed over end has a slight upward oiiset, so that the space G is a little greater than the thickness of the u per disk. The other end of the clamp is folded downwardly in a similar manner and relatively to th lower di k. I

In Figs. 1 and 2 the clamp isshown in the neutral position, that is, the ortion of the lie folded porspace G which is greater than the thickness of the disk and can therefore be readily turned without engaging or interfering wit the clamp, in a simi ar manner the portion of the lower disk which overlies the folded portion H of the clamp is free to be moved without engaging the clamp, and from the aboveit is evident that as long as the clamp is maintained in this position relatively to the central pin and to the disks, it may be rotated about the interfering with eit tial detail. Fig. 3 shows theclamp ushed toward the central pin, the slot S in t e clam allowing this to be done, until the upper dis B enters the space F' which is less than the thickness of the disk this can be done because the material of which the clam is made is elastic and gives sufiiciently to a low the ed of the disk toenter, but is strong and sti enou h in without engaging or to. exert considerable pressure, so that t e clamp is quite securely clamped or wed d to the upperdisk at whatever point may be desired;

Fig. 4 shows the clam pushed in the o posite direction so that t e folded end ongages the lower disk and is held clamped thereto. Thus by a simple push the clamp may be clamped either to the lower or to the upper disk at any point in itscircumference. I will now explain several uses of this feaer disk; this is an essenture of my invention. Suppose, for example, it is desired to make a number of different settings in which one value enters in all, in order to avoid the time wasted and trouble of looking this up on any of the various scales of the lower or upper disk for each 0 eration, the clamp is rotated until the index ine E registers with this value and then the clamp is pushed toward the center and clamped to either the upper or lower disk as desired, thus maintaining as long as necessary a mark upon the'value being used.-

In some solutions of various problems, for

' example Fig. 1:

- carrying with it the clamp D until theindex point of contact bein line E on the clamp re sters with b on the scale 0, the result is then read 0115 on the square root scale under the index line K on the upper disk B. Thus it is evident that the clamp can be used to rharka certain oint on the u per disk while said disk is ing rotated a out the central pin, and relativel to the lower disk, and as described above it can be used to transfer a result on the scales (if 1tghe upper disk to the scales of the lower It will be noted that the u per disk has a very slight saucer shape with the concavity downward toward the lower disk, the only at the lower ripheral edge of the upperdis and the surifce of the lower disk w ere it comes in immediate contact with this edge; this line of contact on -the lower disk. being between two of the annular scales, any possible wearin of the surface will be immaterial, and t us by this feature any possible wee of'the scales on the surface of the lower 1 or of those on the under surface of the upper disk is prevented. What I claim is:- 1. A calculating device comprising a disk carrying a plurality of annular logarithmic scales, a transparent disk overlying same and having itself a plurality of annular logarithmic scales, the scales onone disk registering with those on the'other, said disks rotatably mounted on a pin at .the common center of said scales, and. a

transparent diametral clamp made of a resilient material slightly longe'rthanQ the .v amp b i provided with a slotin its central portion,

end of said diametral clam over the e ge of the up 'springy material adapt aso,ee7

the pin which fastens the disks together passing through this slot, said slot being of such width as to just allow the .pin to be moved in the slot with practically no side to side lost mot-ion; said clamp carrying an index line which coincides with a'diameter of the circle forming the boundary of the outer scale-on the lower disk, and would if continued pass through the common center of said scales, said slotbeing cut through and the clamp body is a little greater than the thickness of the upper disk; the other bein bent downwardly and folded bac para lel to itself with a s ace between it and the folded portion a litt e less than the thickness of the lower disk, the end of the foldedportion having a downward ofiset so that the space between it and the clamp is a little greater than the thickness of the lower disk.

2; A calculating device comprising in combination a lower disk hav' scales, an upper transparent disk also having scala, a transparent diametral clamp between said disks provided with a slot in its central por- 7 tion, also an index line'coinciding with an imaginar line passing through the center a hook sha d bend adapted tolbe clam of said s ot, one end of said clamp haviiroig r disk, the ot er end having a similar adapted to be clamped over the ge of the lower disk; and a pin passing throu h the center of the two disks so that the sai are rotatably mounted, and also passing through said slot in the central portion of said 0 amp.

3. A calculating device comprising in combination a lower disk having. scales, an upper transparent disk also having scales,

ook sha ed bend disks Y a transparent diametlal clam between said disks provided with a slot in its central portion, also an-index line coincid" imaginary line through t e center of said slot, one end o 'said'clamp having a hook shaped bend adapted to be claiitped over the edge of said upper disk, the er end havin a similar hook shaped bend adapted todie clamped over the'edge of said lower disk; a pin passing throu h the center of the two disks so that said isks are rotatably mounted, also passing through said slot in the central portion of said clamp, and a c shaped washer underneath and between tlie upperfhead of said pin and the upper surface of 'said a per disk of some ed to keep the faces with an the lower disk, said up or disk also having scales; a transparent iametral clamp be tween said disk provided with a slot in its central portion, also an-index line coinciding with an ima inary line passing through the center of sai slot, one end of said clamp having a hook shaped bend adapted to be clamped over the edge of the upper disk, and the other end having a similar hook shaped bend adapted to be clamped over the edge of the lower disk; and a m passing through the center of the two disks so that the two disks are rotatably mounted,iand also passing through-said slot in the central portion of said clam 5. A. calculiiting device comprising in combination a lower disk, an upper transparent disk, a transparent clamp between said disks, said clamp being provided with a slot in its central portion, said clamp also having one hook shaped end adapted to engage the upper disk and the other hook shaped end adapted to engage the lower disk, and a pin passing through the center of said disks and also through the slot in said clamp,

Signed at New York in the county of New York and State of New York this 23rd day of April A. D. 1910. I

' ROBERT H. FENN. Witnesses C. F. Klnoonn, EDMUND J FENN.

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